Splash Screen in JavaFX using FXML

FXMLDocument.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.image.Image?>
<?import javafx.scene.image.ImageView?>
<?import javafx.scene.layout.AnchorPane?>

<AnchorPane fx:id="ap" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.60" xmlns:fx="http://javafx.com/fxml/1" fx:controller="splashscreen.FXMLDocumentController">
   <children>
      <ImageView fitHeight="300.0" fitWidth="442.0" layoutX="116.0" layoutY="50.0" pickOnBounds="true" preserveRatio="true">
         <image>
            <Image url="@unidoc%20system_png_transparent.png" /> <!-- You should change this image file and set new image -->
         </image>
      </ImageView>
   </children>
</AnchorPane>

FXMLDocumentController.java

package splashscreen;

import java.io.IOException;
import java.net.URL;
import java.util.ResourceBundle;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Platform;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;

public class FXMLDocumentController implements Initializable {
    
    @FXML AnchorPane ap;
      
    class ShowSplashScreen extends Thread{
        @Override
        public void run(){
            try {
                Thread.sleep(5000);
                
                Platform.runLater(() -> {
                    Stage stage = new Stage();
                    Parent root = null;
                    try {
                        root = FXMLLoader.load(getClass().getResource("SecondScene.fxml"));
                    } catch (IOException ex) {
                        Logger.getLogger(FXMLDocumentController.class.getName()).log(Level.SEVERE, null, ex);
                    }
                    Scene scene = new Scene(root);
                    stage.setScene(scene);
                    stage.show();
                    ap.getScene().getWindow().hide();
                });                
            } catch (InterruptedException ex) {
                Logger.getLogger(FXMLDocumentController.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        
    }
    
    @Override
    public void initialize(URL url, ResourceBundle rb) {
        new ShowSplashScreen().start();
    }   
}

SecondScene.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>

<AnchorPane id="AnchorPane" prefHeight="279.0" prefWidth="600.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8.0.60" fx:controller="splashscreen.SecondSceneController">
   <children>
      <Label layoutX="36.0" layoutY="124.0" prefHeight="32.0" prefWidth="529.0" text="Hello you've implemented splash screen sucessfully">
         <font>
            <Font size="22.0" />
         </font>
      </Label>
   </children>
</AnchorPane>

SecondSceneController.java

package splashscreen;

import java.net.URL;
import java.util.ResourceBundle;
import javafx.fxml.Initializable;

public class SecondSceneController implements Initializable {
  
    @Override
    public void initialize(URL url, ResourceBundle rb) {
        // TODO
    }        
}

SplashScreen.java

package splashscreen;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class SplashScreen extends Application {
    
    @Override
    public void start(Stage stage) throws Exception {
        Parent root = FXMLLoader.load(getClass().getResource("FXMLDocument.fxml"));
        Scene scene = new Scene(root);
        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}

It does not work

Thank you very much. I spent 24 hours looking for and trying to do my splash screen then finally you made it.
and It really worked very well from the first try.
THaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaNKs

Hi,Why can't my picture show？

Nice.

you can also get away with not defining a Thread subclass by:

@Override
public void initialize(URL url, ResourceBundle rb) {
    CompletableFuture.runAsync(() -> {
        try {
            Thread.sleep(5000);
                
            Platform.runLater(() -> {
                Stage stage = new Stage();
                Parent root = null;
                try {
                    root = FXMLLoader.load(getClass().getResource("SecondScene.fxml"));
                } catch (IOException ex) {
                    Logger.getLogger(FXMLDocumentController.class.getName()).log(Level.SEVERE, null, ex);
                }
                Scene scene = new Scene(root);
                stage.setScene(scene);
                stage.show();
                ap.getScene().getWindow().hide();
            });                
         } catch (InterruptedException ex) {
            Logger.getLogger(FXMLDocumentController.class.getName()).log(Level.SEVERE, null, ex);
        }
    });
}